English verb conjugation
COULD TWIT

Regular verb: twit - twitted - twitted

Affirmation

Simple form	V-ing form
I could twit you could twit he could twit we could twit you could twit they could twit	I could be twitting you could be twitting he could be twitting we could be twitting you could be twitting they could be twitting
Perfect	V-ing perfect
I could have twitted you could have twitted he could have twitted we could have twitted you could have twitted they could have twitted	I could have been twitting you could have been twitting he could have been twitting we could have been twitting you could have been twitting they could have been twitting

Negation

Simple form	V-ing form
I couldn't twit you couldn't twit he couldn't twit we couldn't twit you couldn't twit they couldn't twit	I couldn't be twitting you couldn't be twitting he couldn't be twitting we couldn't be twitting you couldn't be twitting they couldn't be twitting
Perfect	V-ing perfect
I couldn't have twitted you couldn't have twitted he couldn't have twitted we couldn't have twitted you couldn't have twitted they couldn't have twitted	I couldn't have been twitting you couldn't have been twitting he couldn't have been twitting we couldn't have been twitting you couldn't have been twitting they couldn't have been twitting

Interrogative form

Simple form	V-ing form
could I twit? could you twit? could he twit? could we twit? could you twit? could they twit?	could I be twitting? could you be twitting? could he be twitting? could we be twitting? could you be twitting? could they be twitting?
Perfect	V-ing perfect
could I have twitted? could you have twitted? could he have twitted? could we have twitted? could you have twitted? could they have twitted?	could I have been twitting? could you have been twitting? could he have been twitting? could we have been twitting? could you have been twitting? could they have been twitting?

Interro-negative form

Simple form	V-ing form
couldn't I twit? couldn't you twit? couldn't he twit? couldn't we twit? couldn't you twit? couldn't they twit?	couldn't I be twitting? couldn't you be twitting? couldn't he be twitting? couldn't we be twitting? couldn't you be twitting? couldn't they be twitting?
Perfect	V-ing perfect
couldn't I have twitted? couldn't you have twitted? couldn't he have twitted? couldn't we have twitted? couldn't you have twitted? couldn't they have twitted?	couldn't I have been twitting? couldn't you have been twitting? couldn't he have been twitting? couldn't we have been twitting? couldn't you have been twitting? couldn't they have been twitting?